Circle of Protection: Red is excellent against a mono-red burn deck, preventing damage from their many direct damage spells and burn creatures like Ball Lightning. Exalted Angel is a huge flying lifelink body that stabilizes the race and is very difficult for their removal-light, creature-light burn suite to answer. Disenchant has very few targets (Cursed Scroll, Seal of Fire) so it's trimmed down, and Mana Leak is less effective since their cheap spells can easily pay the tax. Swords to Plowshares and Wrath of God remain crucial to answer their aggressive creatures.